The most recent version is currently located on a map named "Secret Map" This map is just for testing future content before it gets released to the official map. It has some more weapons, new boss and some new UI. This version is public and can be accessed by anyone.

This is a really fun game but.The gun's damage is lying to me, Shock Cannon does more than advertised and has splash to boot, and the gun from extreme archangel has 10 damage instead of the 30 from the UI.